White-light generating device with fluorescent body with inclined side surface
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United States of America Patent
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Dec 13, 2022
Grant Date -
Nov 26, 2020
app pub date -
Aug 14, 2020
filing date -
Feb 16, 2018
priority date (Note) -
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Abstract
A white light generating device, for generating white light from an excitation light of a laser light having a wavelength of from 280 nm-495 nm, includes a fluorescent body generating a fluorescence having a wavelength longer than a wavelength of the excitation light. The fluorescent body includes an emission-side end surface emitting excitation light and fluorescence, an opposing end surface on an opposite side of the emission-side end surface, and an outer peripheral surface. The emission-side end surface has an area larger than an area of the opposing end surface, and the outer peripheral surface of the fluorescent body includes a part inclined with respect to a central axis of the fluorescent body by from 3.4°-23° over an entire periphery of the fluorescent body. The emission-side end surface has an area of from 0.3 mm2-1.52 mm2.
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